. . "A portion of environmental material which protrudes through a surface layer."^^ . "ENVO"^^ . "This is kept as a general class. One can specify subclasses by identifying the protruding material (e.g. rock outcroup, mineral outcrop, etc ) and the material(s) the protrusion emerges from. Possible logical definition: A portion of ENVO:environmental material which has_quality PATO:\"protruding out of\" a ENVO:surface layer of an ENVO:environmental material."^^ . "2014-04-24T13:12:49Z"^^ . "pbuttigieg"^^ . "outcrop"^^ . "ENVO:01000302"^^ .